Axle spindle lubricator.



J. OLSEN.

AXLB SPINDLE LUBRICATOR.

APPLICATION HLED Amma, 1914. f

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AXLE-SPINDLE LpBRIcAroR.

Specification of Letters Patent. Pam-)1113911 Nor, 1914,

Application filed April 23, 1914. Serial No. 833,929.

T0 aZZ 'whom it may concern.'

Be it known that I, JOHN OLSEN, a citizen of the United States ofAmerica, residing at Ames, in the county of Story and State of Iowa,have invented certain new and useful Improvements in Axle-SpindleLubricators, of which the following is a specification.

My invention relates to improvements in force-feed lubricators for deadaxle spindles on which the bearing boxes of vehicle wheels are mounted,and the objects of my improvement are, lirst, to provide means tonormally exclude dirt, dust or sand from every part of the greasecontainer; second, to provide a telltale whereby the quantity ofvavailable lubricant in the cup may be estimated at sight or accuratelymeasured without opening up the container; and third, to mount thegrease cup in the wheel-retaining nut or axle-nut by an oil-tightconnection. These, and other minor objects, hereinafter incidentallystated, are attained by the mechanical structure illustrated in theaccompanying drawings, in which- Figure l is a vertical longitudinalsection of the whole device including the box and hub mounted on thespindle of the dead axle and the operating wrench inserted; F ig. 2, atop view with the hub and bearing box removed from the spindle.

In all of which views similar reference numerals refer to like parts.

The ordinary axle-nut as here used is shaped with a longitudinallythickened base l supplemented by an inwardly disposed` bearing boss 2 tosupply the requisite length of internally-threaded base to securely seatthe nut on the outer shouldered threaded end 3 of the spindle. Apolygonal outwardly disposed extension 4, to take the usual settingwrench, is supplemented by the further cylindrical extension 6 to givethe required length; the whole extension is shaped to form an outwardlyopening, concentric, internally-threaded chamber, to receive and seatthe open end of the externally-threaded grease-cup.

The grease cup is of cylindrical form, except the outer exteriorpolygonal portion 17 for engagement by a wrench. It is triply sealed inits seat connection to the axlenutz-its inwardly disposed mouth end 18fitted against the base of the nut, its threading in the seat chamber ofthe nut, and its -intermedial collar 19 fitted against the outwardlydisposed mouth end of the seat chamber. 'Ihis prevents any possibleexudation of the compressed lubricant through the joint connecting thegrease cup with the nut. 1

The outwardly disposed bottom or head of the cup has the inwardlystanding tube 20, disposed axially in the cup and its bore continuedoutwardly through the center of 'the head. And the curved wall of thecup is internally threaded from the mouth toward the head.

An externally threaded piston 21 is fitted to the internal thread of thecup, to be revolved therein and travel forth and back endwise by turningin the cup. A piston stem 22 extends outwardly from the center of thecupped face of the piston to closely it revolve and travel endwise inthe smooth bore of the inwardly standing tube on the the operatingwrench, by which the piston is turned to force the lubricant through theducts tothe bearing surfaces or to retire the piston toward the khead ofthe cup for a new charge of lubricant.

The Vpiston stemand the inwardly standing tube are of such lengths as tointerlap at all positions of the piston in the cup, and thereby retainthe grease cup always closed against vsand or dirt. To give a length ofpiston stem facilitating the required interlap in the tube, thepiston-head is cupped reversely to the grease-cup,-as shown in Fig. 1.The retracting of the outer end of the piston stem from the outer endofthe bore of the tube indicates the depletion of and the availablequantity of lubricant in the cup. This is accurately gaged by the indexmark 25 disposed on the shank of the wrench, to coincide with the outerface of the head of the cup when the piston is turned inwardly to itslimit.

I claim:

1. A force feed grease-cup, comprising an internally-threaded cup, "aninwardlyestanding axial tube on the bottom or head ,of thek cup andhaving its bore contiiiiied' `oti"4 Wardly throughy Seidl bottom orhead,\a.,pe ripherally-threaded piston to engage the'in- .Copies of thispatent may be obtained'for ve cents eavcih, by addressing thje-.Commissioner of Patents,

-ternal thead of thecup, and@ pistol; .s teni i6 dispesedoutwardlyinfsaid tube-andi having an engiilr recess in its oterend.

In testimony whereof Ihaveaixed my signatre "i' presence of twoWitnesses.

l -JoHN OLSEN'.1

QWmssese WILLIAM L. ALLAN, J. A. CAMPBELL.

` Washington, D. C.

